Phase change cooling is not really that extreme of a cooling system for benchmarking... go to Quakecon you will see quite a few people with it.LN2 (or even better liquid He) on the other hand could be considered an unfair advantage.

"Nearly 5GHz". The whole point here that everyone seems to be missing is that they made something go more than 1000 times as fast as the original 4.77 MHz IBM PC.

Well, only if you're referring to the clock speed. In terms of raw processing speed (by any reasonable benchmark), they're likely *significantly* more than 1000 times faster, since clock speed refers simply to the number of cycles per second, and doesn't account for how much work can be done per cycle.